Pump barrel



April 2, 1929. R. H. LEMMoN PUMP BARREL Filed Ilarch 22, 1926 wvl Patented Apr. 2, 1929.

UNITED STATES BEES H. LEMMON, F LOS ANGELES, CALIFORNIA.

PUD BARREL.

Application tiled March 22, 1926. Serial No. 96,486.

This invention relates to pump barrels and is more particularly directed to a pump barrel constructed so as to permit the same to be inserted within the ordinary well tubing or Afluid string as employed in the pumping of oil wells and in which barrel a pump plunger is adapted to be reci rocated, and which pum barrel is releasa ly supported within the uid string at one end and packed against l0 the iiuid string at `the other end, and which pump barrel has a plurality of ports formed therein for permitting the pump iiuid to flow or circulate from the pump barrel into the .fluid string around the `pump barrel so as to maintain equal fluid pressure within the pump barrel so as to enable the use of a relatively thin pump barrel which may be inserted within the iiuid string without materially decreasing the size or operative capacity'of the oil well pump.

' This application is in part a division of my copending application, Serial No. 65,315, filed October 28, 1925; y

In the pumping of oil wells, due to the presence of sand, gas pressure and often rotary mud and the like, the pumps become sanded up so that it is necessary to remove the pump assembly from the well to replace the operating valves oi to repair the pump assembly.

Many attempts have been made to provide a pump assembly that could be supported within the well so that when it is required to remove the pump assembly or the working or standing valves thereof, it is only required that the sucker rods which operate the pum plunger need be withdrawn from the wel These attempts have, for the most part, been kpartially successful but have been directed to the provision of means for withdrawing 40 from the well only the pump plunger and the operating and standing valves without provision for the removal of the pump barrel from the well and without the removal of the tubing or Huid string, to the end of which such pump barrel has been suspended. a

Y It is therefore an object of this invention to provide a pump barrel which is adapted to vbe mounted within the well tubing or fiuid string and whichpump barrel may be 'removed or withdrawn from the well on removal of the sucker or pump rods from the 'well, together with the standing, operating v valves and pump plunger of the oil wel] pump assembly. Y

A Another object of this invention is to provide an oilwell pump barrel whichmay be inserted within a uid string of an oil well and in which provided for equalizing the fluid pressure on the interior and exterior of the pump barrel so that a relatively thin pump barrel may be employed without danger vof the same collapsing, and which relatively thin pump barrel will be adapted to accommodate a pump` plunger of such size as not to materially reducethe operatin capacity of such an oill well um over tlat employed in the pumping o we ls using the same size tubing or fluid string which support at their lower end or from the lower end of which is suspended the pump barrel.

Other objects and advantages of this invention will be apparent from the following detailed description of a preferred einbodiment thereof as illustrated in the accompanying drawings, in which drawings: v Figure 1 is a side elevation partlyin vertical section of an oil welll pump plunger embodying this invention.

Figure 2 is an enlarged sectional side elevationof the lower portion of the oil well pump illustratin vthe anchor means provided for releasa plunger within the fluid string. Y

Figure 3 is a sectional side elevation of the upper portion of the oil Well plunger broken away from Figurc2 and illustrating fthe means provided for e ualizing the fiuid pressure within and wit out such pump plunger.

In the preferred embodiment of this invention illustrated in the .accompanying drawings, 1 illustrates a casing which is of any desired or preferred construction and is supported within the well in a manner well understood in the art. AV iuidl string or tubing 2 is mounted concentricall Within the casing 1 and may likewise be ofy any desired or preferred construction. Suspended from the lower end of the tubing 2 is an annular sleeve 3, which annular sleeve 3 is secured to the lower section of the tubing 2 by means of a. collar 4. The anchor sleeve 3 is of reduced diameter to a point near its upper end where the same is provided with a tapered seat 5.

A pump barrel 6 of relatively thin metal,

such as steel, ismounted concentrically within the tubing 2 and is provided at its upper end with an expandible packing member 7 which may be of any desired or preferred construction, one form of which is specifically pump barrel means are ly supporting the pump described and claimed injmy copending application, Serial No. 65,315. The expandible packing member 7 being for the purpose of packing the barrelf outward against they fluid string 2 so as to maintain a fluid tight connection between the barrel 6 and" the tubing 2 at or near the uper end so as to prevent the liquid in the pump, such as the oil, from flowing back into the well after the same'has been'pumped through the'barrel 6 Y around the exterior thereof.

V"of theanchor sleeve 8, also permits the re- The barrel 6 is threaded at its lower end to a sleeve 8, in which'slee've 8 a pin 9 1s secured, which pin 9 and Vsleeve 8' provide a f cage/for the standing valve ball 10. The

standing valve ball 10 yis mounted on a seat 11 which may be of any desired or preferred construction. A coupling memberv 12 is secured tothe sleeve 8 at its upper end and to abarrel anchor 13 at its lower end. The barrel anchor 13 has at itslower end a tapered Vsection 14 adapted to seatupon the tapered seat 5 formed at the upper end of the anchor sleeve 3. From the tapered portion 14, the Vanchor lmember 13 vis of reduced exterior diameter and fits within the anchor sleeve 3' and is provided at its lower end with an expandible.ringmember 15 which is adapted to engage the lower tapered end face 16 ol the anchor sleeve 3 so as to latch the pump barrel 6 in position within` the iiuid string'2 and prevent relative longitudinal movement ofthe fluid string 2 during the operation ef the Yoilwell pump. The expandible ring 15, Vbeing engaged from a tapered end face 16 moval of the pump barrel 6 from the'well without necessitating the remtwall or" the fluid string 2 and thev anchor sleeve 3.

' A pump plunger 17 is mounted within the pump barrel 6 and is supported by rods 18 and adapted to be reciprocated within the pump barrel 6 by means connected at the upper end of the pump rods 18.. The construction and operation of which pump barrel 17 is specifically disclosed and claimed in my copending application, filed March 22, 1926, Seriall No. 96,485.

Y "'.In order to permit the vuse of a relatively v "thin pump'barrel 6, means are provided `for v e'qualizmg the external and internal pressure on the pump barrel 6, which means preferably `jc0mprise a plurality of ports 19 formed in ythe pump barrel 6y preferably at or near the upper en d thereof so as to permit the pump Voil or liquid to flow into the fluidstring 2 laround the pump barrel 6 so that during all pumping strokes of the plunger 17, the pressure on the exterior and interior of the barrel 6 vwill be equalized and thereby prevent collapsing of the pump barrel 6 and the use vof a relatively thin. barrel' in format-ion of theibarrel 6'. lie provision of the extremely Y thin pump barrel 6 and the means for equaliziln'gthe pressure upen the exterior and" in- ,in a given size fiuid string 2.

' Having fully described a preferred embodiment or" my invention, it is to be understoodlthat I do not wish to be limited to the exact details herein set forth, which may obviously be varied' without departing from the spiritot my invention as set forth inthe appended claims? Iclaim: f '1.` In an insertable well pump, the combination of a fluid string,- a pump barrel having a plunger mountedl within'said stringso as to provide an annular space between said string and saidV barrel, means interposed between said string and'said barrel-at its upper end and 'for sealing said annular space from the space within said string and above said barrel, Y

and ports in said barrel below said sealing means placing the space on the discharge side vofthe plunger in communication with said annular space to permit the pumped' fluid to flow outward around said barrel and below saidY sealingmeans.

2. In an insertable well pump,V the 'combination of a Huid string, a pump barrel having a plunger mounted within the fluid string so as to provide an annular space between said string and said barrel, means expansible at will interposed between said string and barrel at its upper end for sealing said annular space from the'spacel within said string and above said barrel, and ports in saidzbarrel below said means placing the space on the discharge side of the plunger in communication with. said annular space to permit the pumped fluid' to flow outward arolmd said barrel and below said means. Y

,3. In an insertable well'pump, the combination of a fluid string having a seating'shoe, a pump barrel having a plunger mounted within the fluid string so as to provide an anlnular space between said string andl said barrel, a seat at the lower end'of saidbarrel supff ported on said shoe toseal the annular space at its lower end, means interposed between n said string and said barrel at its upper end for sealing said annular space from the space within said string-'and above said barrel,and

ports in said barrel intermediatesaid means and said seat placing the discharge side of the plunger into communication with said annular space to4 permit the pumped fluid to low outward around said barrel.

4. In an insertahle well pump, the combination of a fluid string having a seating shoe, a pump barrel having 'a plunger mounted within the fluid string so as to provide an annular space between said string and said barrel, a seat at the lower end of said barrel restin g on said shoe and supporting said barrel to seal the annular space at its lower end, means expansible at will interposed between said 10 string and said barrel at its upper end for sealing said annular space from the space within said string and above said barrel, and ports in said barrel intermediate said means and said seat placing the space-0n the discharge side of the plunger in communication with said annular space to permit the pumped Huid to flow outward around said barrel.

Signed at Los Angeles, California, this l2 day of March, 1926.

REES H. LEMMON. 

